Add instances for fs2.io (#668)

build.sbt

@@ -70,7 +70,8 @@ lazy val zioInteropCats = crossProject(JSPlatform, JVMPlatform)
         "dev.zio"       %%% "zio-stacktracer" % zioVersion,
         "org.typelevel" %%% "cats-effect-std" % catsEffectVersion,
         "org.typelevel" %%% "cats-mtl"        % catsMtlVersion,
-        "co.fs2"        %%% "fs2-core"        % fs2Version
+        "co.fs2"        %%% "fs2-core"        % fs2Version,
+        "co.fs2"        %%% "fs2-io"          % fs2Version
       )
       val optLibraries  = if (scalaVersion.value.startsWith("3")) optLibraries0 else optLibraries0.map(_ % Optional)
       ("dev.zio" %%% "zio" % zioVersion) :: optLibraries

zio-interop-cats/shared/src/main/scala/zio/stream/interop/fs2z.scala

@@ -1,5 +1,36 @@
 package zio.stream.interop
 
-object fs2z extends FS2Platform
+import fs2.io.net.Network
+import fs2.io.file.Files
+import fs2.io.net.unixsocket.UnixSockets
+import zio.*
+import zio.interop.CatsEffectInstances
+
+object fs2z extends FS2Platform {
+  object io extends FS2IOPlatform
+}
 
 abstract class FS2Platform extends FS2StreamSyntax
+
+abstract class FS2IOPlatform extends FS2IOFilesInstances with FS2IONetworkInstances with FS2IOUnixSocketsInstances
+
+trait FS2IOFilesInstances extends CatsEffectInstances {
+
+  implicit final def filesInstance[R]: Files[RIO[R, _]] =
+    Files.forAsync(asyncInstance[R])
+
+}
+
+trait FS2IONetworkInstances extends CatsEffectInstances {
+
+  implicit final def networkInstance[R]: Network[RIO[R, _]] =
+    Network.forAsync(asyncInstance[R])
+
+}
+
+trait FS2IOUnixSocketsInstances extends CatsEffectInstances {
+
+  implicit final def unixSocketsInstance[R]: UnixSockets[RIO[R, _]] =
+    UnixSockets.forAsync(asyncInstance[R])
+
+}